Theoretical interpretation of the HEAO-3 observations of Cygnus X-3 under the HEAO-3 Guest Investigator Program

Details Theoretical interpretation of the HEAO-3 observations of Cygnus X-3 under the HEAO-3 Guest Investigator Program Theoretical interpretation of the HEAO-3 observations of Cygnus X-3 under the HEAO-3 Guest Investigator Program

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987bosu.rept.....m&link_type=abstract

Final Technical Report, 1 Jul. 1985 - 30 Jun. 1987 Boston Univ., MA. Dept. of Astronomy.

Astronomy and Astrophysics

Astrophysics

Accretion Disks, Binary Stars, Coronas, Cosmic X Rays, Cygnus Constellation, Gamma Ray Bursts, Heao 3, Plasma Jets, Precession, Radio Stars, Stellar Models, Supergiant Stars, X Ray Binaries, Astrophysics, Stellar Mass Accretion

Scientific paper

A model of the galactic X-ray source Cygnus X-3 (Cyg X-3) is presented which deviates from previous models by positing that the X-rays originate in a jet rather than a binary system consiting of an ordinary star and a collapsed object. In the new model, the 4.8 hour period of Cyg X-3 is caused by variable absorption which occurs as the jet precesses. The primary role of the accretion disk corona (ADC) in modulating Cyg X-3 radiation is to make the observed intensity of a blob of material in a jet appear dimmer by absorption. The needed derivation of the positional dependence of the density of the ADC is freed of some complications by assuming that only the inner regions of the disk are precessing, with a period shorter than 4.8 hours. This model permits the secondary star to be a supergiant, as indicated by the luminosity of the system. The model is especially helpful in interpreting production of radio outbursts and very high energy gamma rays.

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